Fix scaling with incomplete data
Fix scaling with incomplete data

Now works with data sets that are not the same, as in they don’t line
up 100%. This just normalises the values and expands the line chart.

louisstow/dailygraphics,abcnews/dailygraphics,abcnews/dailygraphics,abcnews/dailygraphics,louisstow/dailygraphics,louisstow/dailygraphics,abcnews/dailygraphics